Mold for forming castings from cement



(No Model.)

S. P. MOKELVEY.

MOLD FORFORMING OASTINGS FROM CEMENT.

No. 474,143. Patented May 8, 1892.

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( M I m W I JQ QW ihyr'rnn STATES PATENT OFFICE.

, SAMUEL P. MOKELVEY, OF CHICAGO, ILLINOIS.

MOLD FOR FORMING CASTINGS FROM CEMENT.

SPECIFICATION forming part of Letters Patent No. 474,143, dated May 3,1892.

Application filed July 14, 1891- Serial No. 399,446. (No model.)

To aZZ. whom it may concern.-

Be it known that I, SAMUEL P. MOKELVEY, a citizen of the Uhited States,residing at Chicago, Cook county, Illinois, have invented a new anduseful Improvement in Molds for Forming Castings from Cement and otherMaterials, of which the following is a specification.

As is well known the curbing at the side of the street or roadway isfrequentlyformed out of slabs of stone of suitable dimensions set uponedge. These slabs are quite thin in comparison to their breadth andlength, and it has been found in using them that there is a tendency forthem to sink into the earth and become displaced, so as to present anuneven and ragged appearance instead of having their tops uniform and ofthe same level. To avoid this it has been customary to construct thecurbing and the gutter adjacent thereto in one piece out of cement orany other suitable material. In this waya broad base is given to thecombined gutter and curb, affording a sufficient bearing-surface restingupon the earth or foundation used to prevent sinking of the curbing andmaintain the uniform and even line thereof. WVhen this combined gutterand curbing is made of cemcut, it is of course essential that a mold,box, or frame-work should be provided to hold the concrete until it hashardened or set sufficiently to stand alone, after which the mold or boxmay be removed. It is also customary in laying such gutter and curbingto first form a certain length thereof-as, for instance, six feet-thento pass by a corresponding space of six feet, and then form anotherportion of the gutter, &c. After these alternating sections havehardened sufficiently to remove the molds similar sections are formed inthe spaces originally left unfilled, completing the curbing. Thesespaces are originally left in order to afford sufficient time for theharden,- ing, which is necessary before the molds can be removed. As thegutter runs down in both directions from its highest point toward thesewer-openings the level and angle of the gutter constantly changes, andmolds of differentheights and angles would have to be used for eachsection, making it necessary to use a large number of molds, which istroublesome and expensive. To avoid this difficulty is one of theobjects of myinvention, and for that purpose I provide a mold made inseveral parts adapted to be rapidly joined together as the gutter andcurbing are made and so constructed that various of the essential partscan be removed before the cement has entirely hardened to be used inmaking another cast, and which is capable of adj ustment to differentheights and angles, as required. In this Way I provide a mold which isserviceable and efficient, by the use of which I am enabled to dispensewith the large number of molds heretofore necessary, thereby simplifyingand cheapening the construction; and my invention consists in thefeatures and combinations hereinafter described and claimed.

In the drawings, Figure l is a perspective view of the mold with itsparts put together in the position which they assume when forming agutter and curbing; Fig. 2, a perspective detail view of a portionof themold, and Fig. 3 a transverse vertical section through the mold and asection of the gutter and curbing.

In constructing my improved mold I first make a back A of any desiredheight and length and of any suitable material, as plank. To this backare secured end'pieces B, preferably made of metal, and attached to theback by means of bolts or nuts I) at any desired distance apart, thedistance between these end pieces determining the length of the sectionof curbing and gutter which shall be formed by the mold. One or morearms C are then provided, and preferably attached to the end piece bymeans of bolts and nuts 0, passing through a slot b in the end piece, bywhich means the arm can be adjusted vertically and angularly relativelyto such end piece. The arm is also provided with a double-beveledshoulder 0', so constructed that while it prevents the arm from fallingbelow a substantially horizontal position it allows it to rise to agreater or less extent above such position, in order to form the gutterwith the necessary inward slant, as hereinafter shown. Thisdouble-beveled shoulder is shown in Fig. 2, which represents the insideor inner face of that end of one of the arms which engages with the endpiece. The length and height of these arms depend upon the dimensionswhich it is desired to give to the gutter, while the breadth and heightof the end pieces determine the breadth and height which are given tothe curbing, as will be evident when describing the method of using themold. To the Outer ends of these arms is secured a bar 'D, of wood orother suitable material, which is preferably fastened to the arms Q bymeans of bolts cl,passing through slots formed in the lug c" on the endsof the arms. I next provide a strip E, of wood or other suitablematerial, the edges of which are beveled, as shown, so as to give thesame curve to the concrete whichever side of the strip is placedadjacent thereto. To hold this strip in place I provide anydesired number of spring clamps or arms F.

- D fastened to the arms.

The device is used as follows: The street having been first properlygraded and the bed or roadway upon which the curbing and gutter are tobe formed having been laid, the back of the mold A is placed in asubstantially vertical position at the side of the road-.

way'and the end pieces secured thereto. The arms 0 are then attached tothe end pieces at any desired height and angle and the bar The concreteor other material used is then laid upon the roadway inside of the moldand formed by suitable tools into the shape shown in Fig. 3, where theportion G forming the gutter is held between the back, the arms, and thebar 1'), while the portion H forming the curbing is formed as shown inFig. 8, its inward face resting against the back A, its ends restrainedby the end pieces B, and its front face supported by means of the stripE, the lower beveled edge of this strip forming the curve h. As shown,the strip E is held in place by means of the spring arms or clamps F,which are sprung over the back, the curbing, and the strip. As soon asthe concrete is slightly hardened the bar D may be unfastened andremoved, then the arms taken off, and the end pieces removed and usedwith another plank in forming another section of the gutter and curbing.The strip E may also be taken off at this time or may be allowed toremain somewhat longer, as desired, and the plank or back A ispreferably allowed to remain until th e cement isthoroughly hardened.

In this way it will be seen that the plank or backing is the only partwhich it is necessary to provide for each section of the mold, and thatthe end pieces, arms, and other parts can be easily removed from theback without disturbing the cement as soon as the latter is slightlyhardened.

The pitch of the gutter or its slope toward the curbing and its heightwill be determined by the angle and height at which the arms are setrelatively to the end pieces, the upper surface of the gutter beingformed level with the upper edge of these arms and the bar attachedthereto, as will be evident from Fig. 3.

While I have shown and described more or A less specific forms, I do notintend to limit myself thereto, but contemplate changes in form andproportion and the substitution of equivalents, as may be necessary oradvisable, my invention consisting, first, in providing a vertical endpiece or pieces for determining the height of the curbing, and,secondly, in providing a vertically and angularly adjustable arm or armsfor determining the height and angle of the gutter, and any means foraccomplishing these ends will fall within the spirit of my invention,notwithstanding the fact that the arm may not be formed and connected tothe end piece in the precise manner shown herein.

It will be evident that, if desired, the barD may be omitted and thefront face of the concrete form ed merely by making a wall of earth orother material at this point without using the bar D.

I claim 1. A mold for the purpose described, com-- v SAMUEL P. McKELVEY.Witnesses:

GEORGE S. PAYSON, ANNIE O. COURTENAY.

